Sole



FIG. 1 is a bottom perspective view of a sole showing the claimed design;

FIG. 2 is a rear view thereof;

FIG. 3 is a side view thereof; and,

FIG. 4 is a bottom view thereof.

The broken lines in the figures show portions of the sole and environment that form no part of the claimed design. 

CLAIM The ornamental design for a sole, as shown and described. 